This policy brief is a stock-taking of the proceedings of the Think 20 conference held in Ottawa on May 3–5, 2015, and co-hosted by the Centre for International Governance Innovation and The Economic Policy Research Foundation of Turkey. The meeting involved representatives of think tanks from G20 countries, leading international experts and a number of senior officials. A number of recommendations for the Group of Twenty (G20) emerged from the discussion. Taking steps to improve cooperation in financial regulatory standards, cross-border macroeconomic policy analysis and implementation, and debt restructuring processes will go a long way in supporting a more prosperous future by strengthening the stability of the global economy and financial system. Most importantly, the G20 should take the lead in establishing environmental sustainability and climate change risks as the biggest threats to the global economy and financial system.